Development of Two Loop-Mediated Isothermal Amplification Assays for Rapid Detection of ermB and mefA Genes in Streptococcus suis

文献类型： 外文期刊

第一作者： Li, LuLu

作者： Li, LuLu;Ren, JinRui;Zhang, Qing;Luo, YanBo;Zhang, Yin;Qi, Jing;Zhao, XiaoNan;Hu, Ming;Liu, YuQing;Li, LuLu;Ren, JinRui;Zhang, Qing;Luo, YanBo;Zhang, Yin;Qi, Jing;Zhao, XiaoNan;Hu, Ming;Liu, YuQing;Ren, JinRui

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关键词： Streptococcus suis; macrolide resistance; ermB; mefA; loop-mediated isothermal amplification

期刊名称：FOODBORNE PATHOGENS AND DISEASE （ 影响因子：3.788； 五年影响因子：3.583 ）

ISSN： 1535-3141

年卷期： 2022 年 19 卷 12 期

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收录情况： SCI

摘要： Streptococcus suis is an important zoonotic pathogen that poses a serious threat to the pig industry and human health. The massive use of macrolides has led to the emergence of resistance in S. suis, and S. suis is suspected to be a reservoir of antimicrobial resistance genes. The mechanism to macrolide resistance in S. suis is mainly due to ermB and mefA. In this study, loop-mediated isothermal amplification (LAMP) methods were developed to detect ermB and mefA genes in S. suis through turbidimetry detection. The sensitivity and specificity of the LAMP reactions were determined. All results of LAMP and polymerase chain reaction (PCR) assay were compared to determine whether LAMP method was accurate and reliable. The results showed that all 100 nonstreptococcus clinical isolates tested negative, indicating the high specificity of LAMP assays. The detection limit of LAMP assay was 1 fg per reaction, and 10(2)-10(4)-fold lower than those of conventional PCR methods. Evaluation of the performance of the LAMP assay in S. suis clinical strains revealed a good consistency between LAMP and PCR assays. In conclusion, LAMP assays are specific, sensitive, and rapid methods to detect ermB and mefA in S. suis.

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